<u>Answer:</u> The steel wire will stretch up to 1837.5 mm
<u>Explanation:</u>
We are given:
Mass = 25 kg
Length of wire = 10 m
Area of cross-section of wire =
(Conversion factor:
)
To calculate the change in stretching, we use the equation:

where,
E = young modulus of steel = 
F = force exerted by the weight = m g = 
l = length of wire = 10 m
A = area of cross section = 
= change in length = ?
Putting values in above equation, we get:

Converting above value in mili meters, we use the conversion factor:
1 m = 1000 mm
So, 1.8375 m = 1837.5 mm
Hence, the steel wire will stretch up to 1837.5 mm